78090009087 has 4 divisors (see below), whose sum is σ = 104120012120. Its totient is φ = 52060006056.

The previous prime is 78090009073. The next prime is 78090009091.

78090009087 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 78090009087 - 2⁴ = 78090009071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78090009007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13015001512 + ... + 13015001517.

It is an arithmetic number, because the mean of its divisors is an integer number (26030003030).

Almost surely, 2^78090009087 is an apocalyptic number.

78090009087 is a deficient number, since it is larger than the sum of its proper divisors (26030003033).

78090009087 is a wasteful number, since it uses less digits than its factorization.

78090009087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26030003032.

The product of its (nonzero) digits is 254016, while the sum is 48.

The spelling of 78090009087 in words is "seventy-eight billion, ninety million, nine thousand, eighty-seven".